similar to: use "integrate" for functions defined in C, not R

Does anyone has a clue what went wrong in the following attempt? I am trying to call the R built-in function Rdqags() from my C program for numerical integration. Following are the C program and the corresponding R program: C program --------- void test(double *a, double *b, double *epsabs, double *epsrel, double *result,

Like kile for LaTeX, Linux/KDE's kate editor is an excellent editor for R, with easy code submission to a running R process. Syntax highlighting is good. I have not been able to figure out two things: - how to automatically reformat a line or region of text using good indentation rules (Emacs/ESS make this so easy by just hitting Tab while the cursor is in a line, or highlighting a

This is not a direct answer to your question, but if all you want to do is integrate a function numerically, you don't need to be doing it through R. You should be able to find codes that you can use directly, such as quadpack or even GSL. You may want to search on GAMS (Guide to Available Mathematical Software, http://gams.nist.gov/). Andy > From: Victoria Landsman > > Dear all,

I was pleased to find integrate() using the quadpack routines "dqags" and "dqagi". However, I would also like to have the routine "dqawoe" included. This routine is summarized as follows... c***keywords automatic integrator, special-purpose, c integrand with oscillatory cos or sin factor, c clenshaw-curtis method, (end point) singularities,

The build system rolled up R-4.3.1.tar.gz (codename "Beagle Scouts") this morning. This is a minor update, with a few bug fixes. The list below details the changes in this release. You can get the source code from https://cran.r-project.org/src/base/R-4/R-4.3.1.tar.gz or wait for it to be mirrored at a CRAN site nearer to you. Binaries for various platforms will appear in due

The build system rolled up R-4.3.1.tar.gz (codename "Beagle Scouts") this morning. This is a minor update, with a few bug fixes. The list below details the changes in this release. You can get the source code from https://cran.r-project.org/src/base/R-4/R-4.3.1.tar.gz or wait for it to be mirrored at a CRAN site nearer to you. Binaries for various platforms will appear in due

The build system rolled up R-4.3.1.tar.gz (codename "Beagle Scouts") this morning. This is a minor update, with a few bug fixes. The list below details the changes in this release. You can get the source code from https://cran.r-project.org/src/base/R-4/R-4.3.1.tar.gz or wait for it to be mirrored at a CRAN site nearer to you. Binaries for various platforms will appear in due

Greetings R users, maybe there is someone who can help me with this problem: I define a function "optim.fun" and want as output the sum of squared errors between predicted and measured values, as follows: optim.fun <- function (ST04, SM08b, ch2no, a, b, d, E) { predR <- (a*SM08b^I(2)+b*SM08b+d)*exp(E*((1/(283.15-227.13))-(1/(ST04+273.15-227.13)))) abserr